us-east-1e is sometimes picked at random, and has no support for
t3/m5 instance types, which breaks some tests.
Because availability_zones is returned in a consistent (sorted) order,
we should at least get either consistent success or consistent failure.
Modules and plugins can only have one integration test target associated with them.
When there is a conflict between alias(es) and/or the target name, only one target will trigger on changes to the module or plugin.
* Update Shippable integration test groups.
* Update integration test group aliases.
* Rebalance AWS and Azure tests with extra group.
* Rebalance Windows tests with another group.
